package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections4.CollectionUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.annotation.Order;
import org.springframework.data.domain.Sort;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.security.PrivateKey;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * 提交订单业务层实现类
 */
@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;

    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //根据前端传递的地址id查询地址信息
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        // 用户地址判断，如果为空，后面的代码都不需要执行
        if (addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //检查用户的收货地址是否超出配送范围
        checkOutOfRange(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        //根据当前登录的用户，查询用户购物车
        ShoppingCart shoppingCart = new ShoppingCart();
        //当前登录用户
        shoppingCart.setUserId(BaseContext.getCurrentId());
        //购物车列表
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        //购物车判断，如果购物车没有数据，代表下单也没有要购买的商品
        if (CollectionUtils.isEmpty(shoppingCartList)){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //组装主订单
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        //订单号一般会根据某些规则生成 订单号通常是有意义的
        //前三位代表公司缩写 后多少位代表下单时间 最后三位代表当期那下单时间的顺序
        //HM20221111080808001 HM20221111080808002 HM20221111080808003
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        //订单状态 代付款
//        orders.setStatus(Orders.PENDING_PAYMENT);
        //待接单
        orders.setStatus(Orders.TO_BE_CONFIRMED);
        //用户id
        orders.setUserId(BaseContext.getCurrentId());
        //订单时间
        orders.setOrderTime(LocalDateTime.now());
        //支付状态 初始化 未支付
//        orders.setPayStatus(Orders.UN_PAID);
        //支付装填 已支付
        orders.setPayStatus(Orders.PAID);
        //当前登录用户
//        orders.setUserName();
        //地址信息
        orders.setAddress(addressBook.getDetail());
        //地址信息（手机号）
        orders.setPhone(addressBook.getPhone());
        //收货人
        orders.setConsignee(addressBook.getConsignee());
        //新增订单
        orderMapper.insert(orders);
       log.info("新增订单完成");
       //组装订单明细
        List<OrderDetail> orderDetailList = new ArrayList<>();
        //购物车中后去订单明细数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            //赋值订单id
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }
        //保存订单明细
        orderDetailMapper.insertList(orderDetailList);
        //删除购物车
        shoppingCartMapper.delete(BaseContext.getCurrentId());
        //返回给前端的响应值
        OrderSubmitVO orderSubmitVO = new OrderSubmitVO();
        //订单id
        orderSubmitVO.setId(orders.getId());
        //订单号
        orderSubmitVO.setOrderNumber(orders.getNumber());
        //订单金额
        orderSubmitVO.setOrderAmount(orders.getAmount());
        //订单时间
        orderSubmitVO.setOrderTime(orders.getOrderTime());


        Map map =new HashMap();
        map.put("type",1); //消息类型，1表示来单提醒
        map.put("orderId",orders.getId());
        map.put("content","订单号"+ orders.getNumber());

        //通过WebSocket实现来单提醒，问客户端浏览器推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
    }

    /**
     * 订单搜索
     */
    @Override
    public PageResult condetionSerce(OrdersPageQueryDTO ordersPageQueryDTO) {
        //开启分页查询
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        //部分订单状态，需要额外返回订单菜品信息，将Order转化为OrderVo
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(),orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        //需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)){
            for (Orders orders : ordersList) {
                //将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDishes = getOrderDishiesStr(orders);

                //将订单菜品信息封装到orderVo中，并提那家到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     * @param orders
     * @return
     */
    private String getOrderDishiesStr(Orders orders) {
        //查询订单菜品详细信息（订单中的菜品和数据)
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        //将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3）
        List<String> orderDishList = orderDetailList.stream().map(x ->{
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        //将该订单对应的所有菜品信息拼接在一起
        return String.join("",orderDishList);
    }

    /**
     * 各个状态的订单数量统计
     */
    @Override
    public OrderStatisticsVO statistics() {
        //根据状态，分别查询出待接单，待派送，派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        //将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 订单详情
     */
    @Override
    public OrderVO details(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.getById(id);

        //查询该订单对应的菜品/套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        //将该订单及其详情封装到OrderVo并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 结单
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                        .id(ordersConfirmDTO.getId())
                        .status(Orders.CONFIRMED)
                        .build();
        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());

        //订单只有存在且状态为2才可以接单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        //用户已支付需要退款
        //拒单需要退款，根据订单id更新订单状态，拒单原因，取消时间
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 取消订单
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());

        //支付状态
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1){
            //用户已经支付，需要退款
        }
        //管理端取消订单需要退款，根据订单id更新订单状态，取消原因，取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     */
    @Override
    public void delivery(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        //更新订单状态，状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     */
    @Override
    public void complete(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        //更新订单状态，状态转换为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 历史订单查询
     */
    @Override
    public PageResult pageQuery4User(int page, int pageSize, Integer status) {
        //设置分页
        PageHelper.startPage(page,pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        //分页条件查询
        Page<Orders> pageQuery = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();
        //查询订单明细，并封装入OrderVo进行响应
        if (pageQuery != null && pageQuery.getTotal() > 0){
            for (Orders orders : pageQuery) {
                Long orderId = orders.getId();  //订单id

                //查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                orderVO.setOrderDetailList(orderDetails);
                list.add(orderVO);
            }
        }
        return new PageResult(pageQuery.getTotal(),list);
    }

    /**
     * 用户取消订单
     */
    @Override
    public void userCancelById(Long id) {
        //根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        //校验订单是否存在
        if (ordersDB == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单装填 1代付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        //订单处于待接单状态下取消，需要进行退款
        //略

        //更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     */
    @Override
    public void repetition(Long id) {
        //查询当前用户id
        Long userId = BaseContext.getCurrentId();

        //根据订单查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        //将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x ->{
            ShoppingCart shoppingCart = new ShoppingCart();

            //将订单详情里面的菜品信息重新赋值到购物车对象中
            BeanUtils.copyProperties(x,shoppingCart,"id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        //将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }

    /***
     * 用户催单
     */
    public void reminder(Long id){
        //查询订单是否存在
        Orders orders = orderMapper.getById(id);
        if (orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //基于WebSocket实现催单
        Map map = new HashMap();
        map.put("type",2); //2代表用户催单
        map.put("orderId",id);
        map.put("content","订单号"+orders.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

}
